CoppeliaSim forums

Hi,

I want to flip an image in a publisher method so , following this post
https://forum.coppeliarobotics.com/viewtopic.php?p=36724&hilit=transformImage#p36724
I use this python code :
data, resolution = sim.getVisionSensorImg(self.visionSensor)
msg = Image()
msg.header.stamp = self.get ...

Thank you for your reply.

Why is it a problem to have a non-convex object? How can it be avoided?

And why aren't mass and inertia appropriate for one physics engine (and I suppose for another)? I have little expertise in mechanics, but I think that physics is physics and that the behavior of a ...

Hi,

I use the following code to dynamically create a cylinder or a dumbbell.
When I run the simulation for the cylinder, the cylinder falls then quickly stop moving.
When I run the simulation for the dumbbell, it falls too but never stop moving. Its mass is the same than the cylinder one.

Why ...

Hi,

With the provided suction pad provided with Coppelia, it attach to an object if there's only a simple contact with them. But, it's not realist, I mean that ALL the surface of the suction pad must cover completely the object, not only a simple contact. If this is true, it means that no air can ...

Hi,

Today, I manage to solve my problem of writing a ROS2 service wich use a custom image message (to ask the service and receive an Image from a vision sensor).

I've written a tutorial about ROS2 services and Coppelia. Here's the link https://docs.google.com/document/d ...

Hi,

My goal is to create a ROS2 service to get the image from a vision sensor. To do this, I follow these steps :

1/ Publish a ROS2 message Image from an PNG file

import rclpy
from rclpy.node import Node
import cv2
from cv_bridge import CvBridge
from sensor_msgs.msg import Image


class ...

OK, perfect.

The only problem is that my scripts don't work at the moment.
Most of the information (data, with, height, ...) are empty or equal to 0 so it means that my scripts (python and LUA) have errors. But I can't see what is wrong.
The LUA script is an 'improvisation', I don't know this ...

Hi,

Using ROS2 service with Coppelia is a bit complicated (edition of interfaces.txt, compilation of libsimROS2.so, ...).
Once the get image service is up and running, I propose to write a tutorial about how to write a ROS2 service for COppelia.
Is there any recommendations for this (format : HTML ...

Hi,

I don't know the LUA language but I try to translate the python script in LUA.

Here's the LUA script :
simROS2 = require('simROS2')
sim=require'sim'

function sysCall_init()
visionSensor=sim.getObject('/visionSensor')
print(visionSensor)
corout=coroutine.create(coroutineMain)
end ...

Hi,

With the help of responses from this topic (see https://forum.coppeliarobotics.com/viewtopic.php?t=10791 ), I can now create a AddFourInts.srv service message and use it in a Coppelia python threaded script.
def sysCall_init():
sim = require('sim')
simROS2 = require('simROS2')
global srv ...